18385742 has 8 divisors (see below), whose sum is σ = 28165536. Its totient is φ = 8997232.

The previous prime is 18385733. The next prime is 18385747. The reversal of 18385742 is 24758381.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 18385696 and 18385705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18385747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97703 + ... + 97890.

It is an arithmetic number, because the mean of its divisors is an integer number (3520692).

Almost surely, 2^18385742 is an apocalyptic number.

18385742 is a deficient number, since it is larger than the sum of its proper divisors (9779794).

18385742 is a wasteful number, since it uses less digits than its factorization.

18385742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195642.

The product of its digits is 53760, while the sum is 38.

The square root of 18385742 is about 4287.8598391272. The cubic root of 18385742 is about 263.9330159871.

The spelling of 18385742 in words is "eighteen million, three hundred eighty-five thousand, seven hundred forty-two".